This is a 5089 MKI in mint condition that was upgraded by Greg at Studio Electronics to an MKII with an additional dual speed envelope switch not found on regular MKII models.
The MKII upgrade for this unit included improved pots and new color coded fluted knobs ("Tonestar" fluted knobs and metal-shafted pots installed throughout, apart from the envelopes, where the custom taper plastic-shafted pots are strengthened with an added bushing: proper ENV pot tapers are not available in metal; top and bottom quick-turn pot shafts are now lined"), more headroom into the mixer and and improved feedback circuit for better balance and control than the original MKI models. Wooden end-bells found on regular MKII models were not included in the upgrade.
The separate dual speed envelope switch upgrade makes it much easier to fine tune tight envelopes.
Comes with a dust cover and power supply.
Pickup, cash only. Can test onsite at time of pickup.